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Louisiana Highway 10 Spur (LA 10 Spur) runs 0.83 miles (1.34 km) in an east–west direction from a local road in Greensburg to a junction with LA 10 just east of the corporate limits. [21] [65] It is a remnant of the original route of LA 10 through Greensburg. [17] [34] LA 10 Spur is an undivided two-lane highway for its entire length. [65]
All the bridge profiles use models with a 95' finished grade elevation, 57.10' lower than the current bridge, and a vertical clearance of 73' that is 62' lower than the current bridge. All bridge models show a 3% grade on the west side. The east side would be 3% for bridge profile 1, with 2.25% for profile 2, and 1.65% for profile 3. [24]
The I-10 Twin Span Bridge, officially known as the Frank Davis "Naturally N'Awlins" Memorial Bridge, is a nearly 5.5-mile (8.9 km) causeway near New Orleans. It consists of two parallel trestle bridges. These parallel bridges cross the eastern end of Lake Pontchartrain in southern Louisiana from New Orleans to Slidell.
By c. 1943, it had been shifted to the north west of New Orleans, using the Louisiana Highway 12 (LA 12), US 190, and US 61 corridors, and serving Baton Rouge but not Lake Charles or Lafayette. [5] The 1947 plan shifted it to roughly the current alignment, including the long stretch of new corridor across the Atchafalaya Swamp. [6]
The bridge was opened to the public in 1973, construction was said to have begun in 1971. At the time of its completion, it was the second longest bridge in the United States, behind the Lake Pontchartrain Causeway Bridge. The bridge includes two exits: one for Whiskey Bay (Louisiana Highway 975) and another for Butte La Rose (LA 3177).
Because of this junction and lack of shoulders along the entire bridge, traffic usually backs up to, at least, the LA 415 exit (Exit 151) and for three miles (4.8 km) along LA 1 northbound. Westbound congestion occurs from slower traffic entering from the short transition zone of the St. Ferdinand Street entrance ramp and the narrowing of I-10 ...
The Interstate Highway System in Louisiana consists of 933.84 miles (1,502.87 km) [4] of freeways constructed and maintained by the Louisiana Department of Transportation and Development (La DOTD). The system was authorized on June 29, 1956 when President Dwight D. Eisenhower signed into law the Federal Aid Highway Act of 1956 . [ 1 ]
With a total length of 58,077 feet (17,702 m; 10.9994 mi), it is one of the longest bridges in the world. The bridge carries Interstate 10 over the Bonnet Carré Spillway, Lake Pontchartrain, and LaBranche Wetlands in St. Charles Parish and a portion of St. John the Baptist and Jefferson Parishes. The bridge opened in 1972. [2]